o dateline >>> at only 22, katie sepich was strong and unafraid. >> she had those fearless attitude iandle it. >> reporter: that summer night in 2003, katie was overpowered. >> she was tough. i think she did everything she could, you know? >> tonight's investigators had made the case a top priority. sepich was supposed to come home late saturday night, but she never did. >> reporter: despite local coverage, there is something different about this case. >> when you have a murder case like this you have people calling in saying, this guy is saying he did this or a saw this. >> reporter: normally people drop a dime on somebody they know? >> you get to some tips, but we just weren't getting any on this one. >> reporter: investigators started canvassing the neighborhood. someone must have seen, or at least heard, something. that is one katie's parents shared an unusual fact about their daughter. katie sepich could not scream. >> she had a very husky voice and she just couldn't scream. when she would try she would go -- she just couldn't scream. >> everything she was little girl. >> reporte